FA20CLUB Over Pipe Front Pipe & Cold Air Intake Now Ready

[soros151]

Originally Posted by TyperRspec789

Perrin intake tube would make more sense as the main contributing factor for the richer AFR. I need a reputable source for this information.

I used to tune R/C car engines and was a mechanical engineering major in college, nothing in my background/intuition would say a higher flowing exhaust or secondary non-O2-sensored cat delete would cause a richer AFR. The only thing I can imagine affecting AFR is a mod prior to the intake manifold- ex. Perrin intake tube.

Call me an ass, but my curiosity is triggered with this thread.

Does anyone know what is Perrin's intake diameter is? They were testing with 2 different configurations.

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[wootwoot]

Do you ALWAYS smell fuel after taking out a cat? Or do you not smell it after a tune due to air/fuel adjustment?

[mike2100]

Originally Posted by wootwoot

Do you ALWAYS smell fuel after taking out a cat? Or do you not smell it after a tune due to air/fuel adjustment?

Unburnt hydrocarbons

[FA20Club.com]

depends on how sensitive your sense of smell is...some people do some dont but its still there

[soros151]

Originally Posted by FA20Club.com

depends on how sensitive your sense of smell is...some people do some dont but its still there

I think the only Scion I have heard people complaining about the smell was the Scion xB.

[Mars2]

So no dyno yet of the car stock?

[FA20Club.com]

its still on the dyno didnt get to do the pulls cause i was still letting the trims set before i recorded runs.

[WatchmaN]

Tony I need you to clarify something cause I'm a bit confuse. You say that "Overpipe, Front Pipe & CAI Tuned +19-21WHP over untuned results", but does not a stage 2 tune gets us 20whp+ alone? so what will I gain if I already have a tune and intall those on my car?

thanks

[FA20Club.com]

Originally Posted by WatchmaN

Tony I need you to clarify something cause I'm a bit confuse. You say that "Overpipe, Front Pipe & CAI Tuned +19-21WHP over untuned results", but does not a stage 2 tune gets us 20whp+ alone? so what will I gain if I already have a tune and intall those on my car?

thanks

the best way to look at the mods you make is this way:

the 1st bolt on will probably yield the best percentage gains. every other mod afterwards will yields less if not minimal gains. so its best to consider the mods as a cumulative effort. so its not hard to consider than an intake makes the same power as a front pipe/over pipe combo. but when you add one after the other dont expect to see 10hp each mod.

[jflogerzi]

Originally Posted by FA20Club.com

the best way to look at the mods you make is this way:

the 1st bolt on will probably yield the best percentage gains. every other mod afterwards will yields less if not minimal gains. so its best to consider the mods as a cumulative effort. so its not hard to consider than an intake makes the same power as a front pipe/over pipe combo. but when you add one after the other dont expect to see 10hp each mod.

But I think he is asking if he has a stage 2 with lets say an aFe intake that makes a around 20Whp. Will a Stage 2 flash, with the front/over pipe combo add another 3-5Whp after the car has been tuned again for new mods?

[FA20Club.com]

yes 3-5 would be a good moderate expected increase in power

[Craig]

Originally Posted by FA20Club.com

youll never maximize gains without a tunes its been proven time and time again. the mods will show improvement but like i stated already ive gotten datalogs from customers who already had a tune and the afr was 1-1.5 afr richer than prior to installing the pipes. i expect that since removing the secondary cat richens up the system quite a bit. and running too much fool limit power output. this is why all the ecutek tunes removes all the excess fuel and we gain 10+whp. too rich="bad" if you had. adversely i did notice that with just the pipes the car on the stock air box leaned out ebough that it gained power but afr was in the high 13s which explains why a stock car shows gains with the pipes only before an intake is added. granted the gains are there but high 13s isnt going to be healthy over the long run.

I'm confused, how does changing the mid pipe effect AFR? Going catless will require me to get tuned? This doesn't make sense as there's no secondary sensor after the first cat in the header...Will this happen on a non-tuned car?

[FA20Club.com]

The secondary has nothing to do with afr function just measuring whether or not the CAT is functional. The mod itself is what requires the tune. Most pipes that have been test to date are catted versions. Which provide a variance in exhaust flow similar to the stock setup. They yield gains since now the inner diameter is increased as well as the chambered resonator. I already explained that the catted version will not mandate a tune earlier from our testing and tuning remotely of our customers. But the catless can yield more gains with a proper tune as compared to the catted version.

[soros151]

If anything I would expect a rich condition with no cat and the stock air box. No cat = a bit of less friction = faster air velocity = gasses exit faster the through the exhaust side = intake air comes in faster = MAF registers more air going in = ECU throws more fuel to compensate for the additional air coming in. I understand the point of having to tune the car for maximum hp extraction, but unless taking the cat out creates a CEL, then I would wait until everything else is maxed out.

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